Combined typewriting ant



.Ocvt. '13,y 1931. H. L. PITMAN 1,827,298

COMBINED iYPEWRITING AND COMPUTING' MACHINE y `Filed June 2, 192e 7 sheetsfshevet 1 Oct. 13, 1931. H. L..v PITMAN 1,827,298

COMBINED TYVPEWRIrTNG AND COMPUTING MACHINE Filed June 2, 1926 'r sheetssheet 2 INVENTOR:

BY W /1 ATTO Y Oct. 13, 193.1. y H. l.. mmm 1,827,298

COBINED TYPEWRITING AND' CQMPUTING' MACHINE Filed .June 2, 1925 v sheets-shet 5 A f for/7g Oct. 13, 1931. L. PITMAN COMBINED TYPEWRITING AND COMPUTING MACHINE Filed June 2,- 1925 -7 Sheets-Sheet 4 [/7 l/e/War A.'

09t- 'l3,""l`931.l H. L. Pl'vrMAN I 1,827,298 y.

' COMBINED YPEWRITIVNG AND 'COMPUTING MACHINE `Filed June 2, 1926 7 Sheets-Sheet 5 fnl/en far ffy.

A fmmey/ Oct. 13, 1931. H. L. PITMAN COMBINED TYPEWRITING AND COMPUTING MACHINE Fzled June 2, 1926 7 Sheets-Sheet 6 o9. 13, .1931 H. L. P'LTMAN 1,827,298V

COMBINED I'YPEWRITING AND COMPUTING MACHINE n l Filed June 2, 1926 '7 Sheets-Sheevt 7 Patented Oct. 13, 1931 UNITED STAT Es PATENT OFFICE HENRY L. PITMAN, OF WESTFIELD, NEW JERSEY, ASSIGNOR, BY MESNE ASSIGNMENTS, TO ELLIOTT-FISHER COMPANY. OF NEW YORK7 N. Y.. \A CORPORATION OF DELAwE COMBINED TYPEWRITING AND COMPUTING MACHINE Application filed June 2. 1326.' Serial No. 113,133.

puting mechanism that is below the type-Y These "rack-bars subsequently run writer. the digits indexed therein into computing wheels. `To enable any numeral-key to'l set an index-pin in' any rack-bar, a so-called pinsetting frame is interposed betweedmembers' depending from the" numeral-key-levers and the index-pins on the rack-bars. Thepin-setting frame includes pin-setting bars, one for each numeral-key, arranged transversely of the-rack-bars and over the index-pins therein. Each pin-setting`bar isdepressible. by an operation of a corresponding numeral-key.-A and, when. projected, is-'normally in advance ofthe corresponding transverse row of indexindex-pin, the rack-barin which the pin is to` be' set must be slightly advanced, so that the index-pins thereinare directly under the pin-setting bars. There is usually a plurality of'saidArack-barsyland they are advanced one after the other indenominational order as the typewriter-carriage passes in letterfeeding steps through a computing zone.

One object vof the present inventionis to.

provide improved and simplified "means whereby the pin-bars.l are thus advanced seriatim. L Means heretofore provided include a settable one-way acting tappet on the types writer-carriage,` which lactuates jacks interposed between said `tappet and thrust-rodsy extendingdovvnwardly towardf'a mechanism 'whereby the thrust imparted'to an actuated thrust-bar p is translated into the slight advancemovement 'of the corresponding rackbar necessary to bring the index-pins in said bar under the pin-setting bars. A denominational tabulating mechanism` isusually employed, and said tappetj-'is usually set in a certain relation to the usual tabulating counter-stop.

According to the present invention, the tappetis combined with and forms an integral part of a tabulating` counter-stop, so that when al counter-stop is set, a tappet is setat the same time, said tappet also directly en-4 gaging the ends of the thrust-rods, as the carriage moves through a computing zone.

An importa-nt feature of the invention is. that,- where severalregisters are-employed and spaced apart in the direction of carriagetra-vel, the several corresponding sets f ends of the thrust rods,or jacks engaged by the tappets are grouped together in one zone contiguous to the place from which the denominational tabulatng stops are projected into the ypath of a counter-stop ori the carriage, The different sets of jacks arearranged zog said zone inset-defining rows, one'row being forwardof the other. jacks reach from said one zone toward spaced sets of members of the corresponding regis; ters, whereby the rack-barsare advanced seriatim in inverse nrderto the seriatim perapns. To enable the Pin-setting bar to set an, tlon 0f the Set of thrust rods or Jacks. e

One.v advantage of having the .tappeti-en-` gaged ends of allr the thrust-rods brought to one zone is that, it facilitates the #setting of the tabu'lating stopsv and"jacl engaging tappets thereon', vit being readilyV understood that a shortened,ard that the over-all width ofthe typing carriage on which said'bai'is mounted may therefore be correspondingly reduced The several. sets lof where the length of said bar determines said over-all width.

Still another advantage resulting from bringing the aforesaid jacks all to said one zone is that only one tappet need be employed when it is desired to compute in several registers simultaneously, it being readily understood that by reason of the different rows of jacks being brought together and the rows placed one ahead of the other in one zone, the tappet may be so constructed as to simultaneously engage and actuate more than one row of jacks. Heretofore when the tappetengaged jack-ends of the several sets of jacks were grouped in different zones, it was necessary to set. a tappet for each of the several registers in which it was desired to compute simultaneously.

The patent to O. W. Olmsted, No. 1,224,314, dated May l, 1917, discloses'a tappet combined with a tabulating counter-stop to directly engage a thrust-rod. The present invention as related to this feature is an 1mprovement over the invention in said patent, in that the tappet has been devised to engage and actuate the thrust-rods in either. direction ot' the carriage movement. In said patent the tappet is spring-pressed and pivoted on the counter-stop in such a way that it acts as a one-way pawl, and is consequently caused to be diverted by a backward movement of the carriage through a computing zone. In said patent means whereby the ends. of the thrust-rods are caused to be withdrawn from the path of the tappet are actuated by operation of the back-space key. In the present invention such withdrawal of the thrust-rods upon operation of the back-space key 1s unnecessary, because the tappet is not dlverted by the ends of said thrust-rods in a backward movement of the carriage. Anotheradvantage gained by the use of a tappet lntegral with the tabulating counter-stop is that such a tappet may be made more rugged and at less cost than a spring-pressed pivoted pawl tappet. The actuating surface of the ta pet Y' is V-shaped and the apex of the V slig tly rounded, and said surface is hardened and highly polished. The ends of the thrust-rods are substantially semi-spherical in shape and are also hardened 'and highly polished. By means of these hardened and highly polished surfaces the friction between said ends and the tappet is reduced to a minimum.

The ends of the thrust-rods are necessarily arranged at or near the place from which the denominational stops are projected into they path of a tabulating counter-stop. From said place the thrust-rods are directed downwardly toward a mechanism whereby the rack-bars are not only advanced seriatim, but in inverse order to the seriatizn operation of the thrustrods. Another object of the present invention is to accomplish this inversion of the order of operation by improved means which may be applied to machines having more than one set of rack-bars for operating more than one set of computing wheels. In the aforesaid patent to Olmsted, said inversion was accomplished by offsetting one end of each thrust-rod from the other end. The arrangement of a full complement of such rods requires a sort of interweaving of said rods, as

shown in said patent, which is not adaptable o machines having more than one set of rackars.

To accomplish said inversion in the present invention there is provided for each rack-bar a bell-crank lever with one arm adjacent to the rack-bar and another arm in the plane toward which the corresponding thrust-rod is normally directed. The two arms of each bell-crank lever are connected by a U-shaped yoke, and the yokes of the different levers are of varying depths, so that when a full complement of bell-crank levers is mounted on a common fulcrum shaft a nested arrangement of said yokes may be effected. Said yokes are disposed in two groups, each group spaced about degrees from the other in order to avoid undue depth of the outer yokes. It will be understood that the number of groups in which said yokes are disposed depends on the number of bell-cranks mounted on the common fulcrum shaft. It will also be understood that the reason for the aforesaid inversion of the order of operation is that in writing a row of digits, the carriage moves in letter-feeding steps from right to left, and consequently actuates the thrust-rods from right to left, and that said digits must be in dexed in the rack bars from left to right. A plurality of simple levers, one for each bellcrank, is interposed between the lower ends of the thrust-rods and corresponding bellerank arms. Said levers mounted on a common fulcrum shaft give the bell-cranks their proper direction of rotation. One advantage gained by the use of said bell-cranks, each made of one piece, is that there is required a numberof parts substantially ,less than in the mechanism heretofore used :for eliecting the same purpose.

Another object of the present invention is the provision of improved and simplified means for silencing the computing mechanism. Such silencing is preferably accomplished by making the means whereby the rack-bars are advanced seriatim ineffective as heretofore, but by simplified means. To this end connections between the aforesaid ,bell-cranks and' the rack-bars are made by means of members interposed between the rack-bars and the bell-crank arms adjacent to said rack-bars, said members being shiftable into and out of effective position. Suitable means are provided to shift all of said members into ineffective position sinmltaneously. In the preferred form of the invention said members are thrust-bars, each havwith the rack-bars, and, by simple connections to be described, said bail is actuated veither by operationof a tabulating key, a a case-shift key or while non-computing key, the computing mechanism is going through a machine cycle. One advantage gained by silencing the computing mechanism 1n this manner is that the meansI involved are more simple, and consequentlycost less for manufacturing and maintenance than the means heretofore used.

The variousY featuresofthe invention are shown applied to a standard machine, which has two sets of Acomputing wheelsoperated .by two sets of rack-bars requiring two sets of thrust-rods. The upper ends of said rods are arranged in two rows directly behind the upper. ends of the tional tabulating stops. From each of said twoV rows a set of thrust-rods is directed toward a corresponding 'set of rack-bars, a set of rack-bars being arranged at each side of the computing mechanism leaving a substan,

tially unoccupied space between said sets.

Another object of the present invent-ion 1s to operate the computing mechanism by power-driven means that may be placed in die unoccupied space between the two sets of, rack-bars. Said power-driven means include an electric motor geared to the usual operating cross-shaft of the computing mech anism. To this end, said shaft has mounted thereon a gear sector meshing with a rack which forms part of a member mounted for a reciprocating movement which is imparted to said member in the usual manner by a revolving roller and slot device, the slot being formed in said member at right angles to its direction of movement and the roller being one end of a worm and gear train driven by the electric motor through the usual clutch,

Said clutch is of the type shown in the patent to A. J. lNood, No. 1,299,646, dated April 8, 1919. D evisin the power-drive in this way so that it may I{e placed within the space oc cupied by the computing mechanism proper makes possible a compact machine, which has theV advantage of being portable, of requiring less room and of being economically manufactured.

Another objectv of the present invention is to provide improved means whereby a circuit is automatically closed to start the motor simultaneously with the'engagement of the clutch forja colputing `machine cycle, said circuit being au matically broken at the end of said, cycle., As shown` in the aforesaid patent toWood, the clutch includes a driving ratchet directly geared to themotorand usual row of denominav a rotatable, driven member connected to the computing mechanism by the aforesaid roller and slotted member. The engagement of the driving ratchet and driven member is effected by a slight rotation of a disk. This slight rotation is imparted by means of a spring. between the driven member and the disk when a bolt which normally restrains the disk against said rotationv is withdrawn. Said slight rotation causes pawls on the driven member to be engaged by the ratchet. As shown in said patent to Vood, said rotation causes contacts to close and complete a circuit to start the motor. These contacts are confined within the clutch casing, and .are practically inaccessible unless the clutch casing is taken apart.

Means are provided whereby contacts to close and open the motorl circuit may be op erated otherwise than by the rotation of the aforesaid disk, so that said contacts `may be placed elsewhere than in the clutch casing. Contacts Iwithin the clutch casing besides being inaccessible are subjected to undesirable contact with tlie lubricant in said casing. There is provided accordingly a pair of contacts, one of which is spring-pressed and normally held separated from the other by a latch member. Said latch member is withdraw-able by the same means that withdraw the aforesaid bolt to engage the clutch. This withdrawal of said latch member causes the spring-pressed contact to be released and close with a snapl on the other contact simultaneously with the engagement of the clutch. During the ensuing computing machine cycle the latch member by suitable means tobe described is caused to move and overhaul the released contact, and be in position to retract said contact and thereby' break the circuit at the end of said cycle. This retraction of the contact opens -the circuit and is effected witha snap movement as will be shown. It will be understoodthat the cycle is caused to be terminated at the end of one revolution of the clutch by permitting the aforemen-v tioned bolt to intercept the usual projection on the aforesaid disk, as shown in said patent to Wood.

'Another object of the present invention is to provide improved means whereby the usual clear sign character may beprinted when all the dial wheels of a register stand at zero. Said improved means enable the printing of said character to be done by regular finger operation of a key-lever instead 0f said key-lever being actuated by means of a spring and other devices and restored during amachine cycle of the computing mechanism, as shown in the` patent to R. F. Hoyt,

. No. 1,256,309, dated February 12', 1918.

In the present invention two keys and two key-levers of the regular keyboard are, used to print asterisks or stars of different designs, one for each register. -An interponent under each of said two key-levers is in position to thwart the operation of said keylevers, if the corresponding registers are not clear. 'If a register is clear, the interponent is caused to be withdrawn by means of a link which connects it to the usual bail, shown' in said patent to Hoyt. Said bail is springpressed against the usual row of detents which locate the dial wheels in their digit positions by means of the usual detent notches in the dial wheels. The detent notch corresponding to the zero position of a dial wheel is more indented than the other notches; consequently when all the dials are at zero, the

bail. hearing against the detents, has assumed a position which causes the aforesaid interponent to he withdrawn.

A Feature related to the star key-levers is the simple means whereby said levers when operated also cause the restoration of any pins that may have been idly set in the computing mechanism rack-bars. lt will be understood that such idly set pins. if not restored. would cause the corresponding resfister to indicate a result not in accord with the figures regularly entered therein. Thus the printing ot' a star not onlv indicates that the refrister is cleared. but it also indicates that. no pins are set when a star is printed. and the, means whereby the restoration of any idlv set pins is thus accomplished include a simple cam that may he on the end of and Dart ot' each star keV-lever. Said cam eny(rages the end of the interponent which is in the form ot an arm of a bell-crank lever and rotates it so that the other arm orn said bellcrank lever engages and actuates the pin-restoring connections related to the elimination kev.

Said elimination key which is another feature of this invention is preferablv a rod movable endwise and is connected to the usual pin-restoring means bv means consisting ot a bell-crank. one arm of which is en .fraged and moved bv the endwise movement of the. elimination key-rod. The other end oi the hellcrank by means of a simple link is connected to an arm by which the usual pin-restoring platform sh aft. shown in said patent to Hoyt. mav be operated. The elimination kev on its return stroke operates the usual starting key to initiate a machine cycle of the computing` mechanism to cause the restoration to normal of all parts of the computing setting mechanism. To operate the starting key the elimination key-rod is provided with a hy-pass,f

pawl that is inefective to actuate said starting key on the forward stroke of the elimination key.

Other features and advantages will hereinafter appear. y

ln the accompanying drawings,

Figure 1 is a cross-sectional side elevation of an Underwood-Hanson combined typewriting and computing machine, showing features of the invention.

Figure 2 is a fragmentary side view showing the star key-levers and the parts that control the operation of said levers.

Figure 3 is a. perspective view of the computing mechanism showing features of the invention.

Figure 4 is a rear elevational view of the combined typewriting and computing mechanism, showing the thrust-rods and their arrangement with respect to the two sets of rack-bars of the computing mechanism.

Figure 5 is a side view showing the operation ot the means whereby the indeX-pin-setting mechanism is silenced during a machine cycle of the computing mechanism.

Figure 6 is a side view showing the elimination key and related parts operated to restore the index-pins in the rack-bars."

Figure 7 is a side view showing the operation of the means whereby the elimination key on its return stroke trips the starting key.

Figure 8 shows a tabulating stop combined with a tappet for actuating the thrust-rods for the left-hand register rack-bars.

Figure 9 shows a tabulating stop combined with a tappet for actuating the thrust-rodsy for the right-hand register rack-bars.

Figure 10 shows the operation of the means whereby the pin-setting mechanism is silenced when the non-computing key-lever is set.

Figure l1 is a top plan view ofthe means for adjusting the bell-crank or transposing levers, whereby the order of operation is inverted.

Figure 12 shows a rack-bar slightly advanced by the denominational pin-selecting means which inclu de the aforesaid transposing levers and thrust-rods actuated by said tappet.

Figure 13 is a Fide view showing the transmission clutch, motor switch and related parts in normal position.

Figure 14 is a side view showing the transmission clutch, motor switch and related parts in their relative positions when said clutch has been engaged and the computing mechanism has been started on a'machine cyclel Figure l5 shows the transmission clutch, motor switch and related parts in their relative positions at the moment when said clutch has'been engaged by operation of the starting key. Figure 16 is 'a perspective diagram showing the means whereby the clutch is engaged and the motor switch operated and controlled.

Figure 17 is a diagram of the motor circuit.

Figure 18 shows details of the driving connection between the driven member of the clutch and the computing mechanism.

Acontrolled automatic starting devices.

Figure 21 shows the connecting linkage Ibetween the usual ease-shift frame and the bail-rod whereby the denominational selecting means are silenced.

Figure 22 shows an alternative design of characters to be printed by what would otherwise be the star-key levers.

In the Underwood-Hanson bookkeeping machine numeral keys 15 and alphabet keys 16 swing key-levers 17 about a fulcrum 18, thereby causing bell-cranks 19 toswing about a fulcrum 20and operate type-bars 21. Said type-bars vwhenV operated swing upwardly and forwardly about a fulcrum 23 to. print against a platen 24. Said platen is revolubly mounted in a carriage 25 which is movable on rails 26 and 27 in a letter-feeding and reverse direction.

The carriage is pulled in said letter-feed- 'ing direction by a spring motor, not shown. The letter-feeding steps of the carriagefare controlled by an escapement mechanism that includes an escapement 4wheel 30.controlled by a loose dog 31 mounted on a dog-rocker 32 which also embodies a fixed dog 33. Said dog-rocker is pivoted at 34 for a rocking motion imparted to it by the universal bar 35. A rearward extension 36 of said universal bar is supported and guided by a U-shaped.

frame 37 pivoted at 38. The universal bar 35 is actuated in the usual manner by a heel 39 of any operated type-bar. The usual Underwood denominational tabulating mechanism includes alplurality of tabulating keys 40` which are mounted onkey-levers 41 part-y ly shown in Figure 1. l i' The rearward extensions, not shown, of said key-levers 41 'when operated elevate the usual denominational stops 42 to cause the upper ends 43 thereof to be projected into the path of the usual tabulating counter-stops 44, which have features to be described later on. Saidacounter-stops are settable in the usual v notched bar` 45 supported between brackets 46 proiecting from the typewriter-carriage 25. The denominational stops 42 actuate the usual universal bar 50, which is mounted on a shaft 51 that is rotated to cause the engagement of the usual speed governor, not shown, whereby the speed of the carriage during a tabulating movement thereof is governed. Connection to said speed governor is effected byalink 52, partly shown, and an arm 53.

Each numeral key-lever has depending therefrom the usual stem 54. Said stem when' a numeral key'is operated is thrust downwardly to engage an armA 55. and thereby rotate a rock-shaft 56 of a pin-setting frame generally indicated at 57. There is a rockshaft 56 for every significant key-lever, and operation of said rock-shaft causes a corresponding pin-Setting bar 58 to be depressed. The pin-setting bars, of which there is one for every significant numeral key-lever, overlie a bank of index-pins 59, nine of which are in each rack-bar 60. The pin-setting bars' 58 are normally slightly forward of the corresponding transverse rows of index-pins. To enable an index-pin to be set in any rack-bar, said rack-bar must be advanced slightly, so that the'pins therein lie directly under the pin-setting bars. The rack-bars are thus advanced or selected one after the other in denominational order as the typewriter-carriage moves through a computing zone.

To accomplish this denominational selection of the rack-bars, a tappet 63engages the upper ends 64 of thrust-rods 65 as the typewriter-carriage passes through said comput- .ing zone, and as the tappet overrides said ends of the thrust-rods is contiguous to the` denominational tabulating stops 43. Any

one of. the counter-stops 44, which co-operate with the denominational stops 43, may therevfore also include the tappet 63, which' engages the upper ends of the thrust rods or jacks 65, `and said tappet 63 may be Wide enough to actuate more than one row of jacks simultaneously, as indicated in Figure 12, or it may be formed to operate only one row of jacks 65, as indicated in Figure 8 or 9.`

As indicated in Figures 3 and 4, the different sets of thrust-rods may, by oblique reaches 49 of the individual rods, diverge from the one zone in which the upper ends of all the jacksfare arranged, and thus may extend outwardlyj'iand downwardly to their respective sets/of spaced-apart computing lmechanism members for connection thereto. The upper ends 64 of the thrust-rods may be ided in a plate 61, in which are guided a so the tabulating stops 43. Application of the fea ture of bringing all the thrust-rod sets to a common zone is not limited `to only the two sets of thrust rods or jacks illustrated be thrust-rods. Said lower ends may be in the form of lugs 62 having screw holes into which the end thrust-rods are threaded, said screw holes enabling adjustment of the effective lengths of the thrust-rods. The levers 66 are mounted on a common fulcrum shaft 67, and have arms 68 which engage arms 69 of transposing levers 70. Said transposing levers are for the purpose of inverting the order of operation between the thrust-rods and the corresponding rack-bars. Said inversion is necessary because .the typewriter-carriage moving in letter-feeding steps actuates the thrust-rods from right to left` but the corresponding rack-bars must be denominationally selected and advanced in an order beginning from left to right.

An arm 69 of each of said transposing levers 70 is substantially in the plane toward which the correspondingr thrust-rod is normally directed, and an arm 71 of the same lever is in a plane adjacent to the corresponding rack-bar. Arms 69 and 71 of each pair are connected by a U-shaped yoke 72. 'lhe yokes of the different levers vary in depth, as shown in Figure 3, ,and are disposed in groups, the yokes of each group nesting one within the other. Rotation of one of the transposing levers 70 is effected when a thrust-rod is depressed. This rotation causes a thrust-bar 73, connected to the arm 71, to be thrust forward and thereby advance a rack-bar by means of a projecting pin 74 fastened in the side of said rack-baz'. A rack-bar is held in its denominationally advanced position until, by operation of any numeral key, the carriage escapes and advances a letter-feeding step and thereby causes the advance of the next rack-bar, the previously advanced bar being thereupon retracted by a spring 78a. One end of the thrust-bar 73 is pivotally supported by the corresponding arm 71 at 75. The other end of each thrust-bar has a slot 76 which embraces a bail-rod 77 bv means of which said 'other end may be withdrawn from the pin 74. -By such withdrawal every thrust-bar 73 and the train of parts leading to it are silenced as pin-setting elements by operation of said bail-rod. The bail-rod 77 is supported by arms 79 fastened to a rock- Shaft 80.

There is a separate bail-rod 77, with supporting arms and shaft, for each set of rackbars. According to the present form of the invention the bail-rods are connected for simultaneous operation by a U-shaped frame shafty a that may be suitably supported from the cross-member'86.

To prevent overthrow of the transposing levers 70, the arm 69 of each lever stopped by the end of an adjustable screw 78 shown in Figures l1 and 12. The screws for adjusting all the transposing levers of a set rackbars are arranged 1n rows separated by a,

plate 81 which coacts with the squared heads of the screws to secure their adjustment against change. The screws are'threaded through a cross-member 86 and the plate 81 may be held in place by screws 81a. The plate 81 is removed when the screws 78 are being adjusted.

The shaft 83 on which the U-shaped frame 82 may be loosely mounted is supported in bearings 85 erected upon the cross-member 86 which connects the usual side frames 87 of which the left-hand one is shown in Figure 3. rIhe left-hand rock-shaft 80 has fastened to it an arm 88 which has at its end a pin 88. Said pin 88 is engaged by an arm 89 of the usual lever 90, which is rotated from its normal position at the beginning of a computing machine cycle and is latched byl an arm 91` the end of which falls behind a block 9()a fastened to said lever 90. At the end of said computing machine cycle, the arm 91 is withdrawn from the lever 90, by means of an extension 92 of said arm 91. Said extension 92 is struck by a tab 93 of the left supporting bracket 94 of the general operator 95 at the end of said computing machine cycle, thereby causing the arm 91 to be rotated and withdrawn as stated. To rotate the lever 90 vat the beginning of the computing machine cycle, said lever is provided with an arm 96 having at the end thereof a roll 97. Said roll normally lies in a notch-98 in the'left-hand rack 99 of the general operator frame. When the general op'- erator 95 advances, by means of said rack 99, the roll 97 is displaced and caused to ride out of the notch 98, thereby rotating the lever 90 which is ivotally mounted on the side frame 87. ie general operator 95 has a reciprocating movement and at the end of itsV return stroke the lever 90 is released in the manner described, allowing thevroll 97 to fall back into the notch 98 as said lever is retracted by means of a spring 100. Thus, it will be seen that substantially throughout a computing machine cycle the lever 90 is disA placed from its normal position, thereby causing, by means of the aforesaid arms 88 and89, the rock-shafts 8O to be rocked. Consequently, throughout said computing machine cycle, the thrust-bars 7 3 are caused to be withdrawn from the pins 74 of the rackbars,` thereby silencing the denominational selecting elements. Said elements are also silenced on other occasions in a manner to be described.

When index-pins have been set in the rackbars, by operation of the numeral-keys, the lower ends of the set index-pins project below the rack-bars and lie in the path of the general operator 95 which is now caused to move forward and back. The forward movement of said general operator is transmitted to said rack-bars which thereby move through a number of digit-spaces depending upon the pins that were set.` Assaid rackbars move forward they rotate. the dialwheels 102 by means of pinions 103, said pinions having the usual ratchet connections, not shown', vto the dial'wheels 102 whereby said wheels are rotated only during the forward movementof the rack-bars. The number of digit-spaces that each dial wheel is rotated depends upon theI extent of the forward movement ot the corresponding rackbar. At each digit-space the 'dial wheel is detented, by means ot a spring-pressed detentlever 104, co-operating with datent-notches 105 formed on the side of cach dial wheel. The detent-notch corresponding to the zero position of each dial-wheel is more indented I' than the othernotches, thereby causing a, correspondingr displacement ofthe detent-lever 104 when the dial wheel is at zero. When all of the dial wheels of a register stand at zero, said corresponding displacement in the posiA tion of all the detent-levers 104 causes a bail 106, which -is spring-pressed against said detent-levers, to assume a corresponding position.` Thus. the bail 1.06 has one position when all the dial wheelsstand at'zero, and another position when one or more dial wheelsarc rotated past Zero. The displacement from one position to another of the bail 106 is used to actuate an interponent 107. and causes said interponcnt to be in either one of two positions. In the one position. as shown in Figure 1, said interponent clears the end ot a corresponding key-lever 108 so that said key-lever is free to be operated. This condif tion occurs when all the dial wheels stand at Zero. Should any dial wheel of a register be at a position other than zero.v the corresponding detent-lever 104 is moved. causing the bail 106 to assume a different position which is effective to bring the interponcnt 107 into position where its end 10,7a underlies the end of the key-lever`108. and thereby thwarts the operation of said key-lever as shown in Figure 2. Thus it will be seen that the key-lever 103 isoperable only when all the dial wheels of the register which control it stand at zero, and said key-lever may be used to print an asterisk or star as an indication that said register is clear. The machine herein illustrated has two registers, and two key-levers 108 of the regular keyboard are used. cach of which prints an asterisk or star ot different design, one for each register. Each star keylever is controlled by its own interponent 107, each interponent beingr in turn controlled by the bail 106 of the correspondinar register. When a star key-lever-is operated it is also desirable to actuate the ,usual pin-restorinf platform, so that any index-pins whichmay have been idly set are restored. The means whereby this is accomplished will be described later on. Connection between the interponent 107 and the bail 106 is effected by means of a link 110 which -connects an arm 111 to one of the sidearms 112 of said bail. The connection to said side arm is madeby means of a pin-and-slot connection 113, so. that the bail 106 may be moved independently of the link 110 in a manner to be described. A spring 114 keeps the pin of-said pin-andslot connection normally engaged with the y end of the slot.

The usualmeans for silencing the computing mechanism, shown in the patent to A. G. Kupetz,No. 1,452,162, dated April 17, 1923, include a non-computing key or lever 115 (see Figure 1), which is pivoted to the lefthand typewriter side frame at 116. Said lever 115 has an arm 117, which embraces a pin 118 projecting through a hole in the end of an arm 119, loosely mounted on the operating shaft 120 of the computing mechanism. Same arm 119, in order to be extensible for reasons to be described, is made of two parts, one of which 121 is slidably mounted upon another part 122. When the non-computing lever is operated to silence the computing mechanism, it is rotated counterclockwise and` assumes the position indicated in Figure 10. In said position the upper part 121, through which the pin 118 projects, 'is displaced with said pin, causing a. bar 124 inwhich said pin is fastened to be thrust rearwardly and latches by means indicated at 125. The bar 124 in its rearward position causes a lever 126 to be rotated and ^displaced from its normal position. ASaid lever isa part of the usual meansfor 'silencing the automatic starting mechanism, shown in said patent to Kupetz. and inthe present invention is provided with an arm 127, which, by nieans of a link 128, is connected to an arm 129 fast to the right-hand rock-shaft 80. Thus, there is a train of parts operated by setting the non-computing lever 315, whereby the rock-shaft A is caused to be. rocked. Said rock-shaft, as heretofore mentioned, actuates thebail-rods 77 to cause the withdrawal ofthe thrust-bars 73. In this manner the denominational selecting mechanism and consequently the computing mechanism is silenced by setting the non-computing lever. lSaid non-computing lever is restored to its normal position in a machine cycle of the computing mechanism which causes means to be operated. as described in said patent to Kupetz. Said means include a cam 133 fastenedto the operating cross-shaft 120. Said cam, as the cross-shaft rotates during the computing machine cycle, raises the upper part 121 of the'arm 119, thereby causing the bar 124 to be released from the latching means 125. The bar 124 and its connected parts are then'rctracted by means of a spring 134. The usual spring 135 retracts the los lever 126, thereby allowing/the train of parts connected to the arm 127 to restore the thrustbars 73 to their normal positions. The denominational selecting mechanism is also silenced by the operation of any one of the tabulating keys 40, so that said denomina tional selecting mechanism may not be actuated during a tabulating movement of the typewriter-carriage in a computing zone. To this end, the rock-shafts 80 are caused to be rotated by the operation of any of the tabulating keys 40, to effect the withdrawal of the thrust-bars 73. To rotate said rock-shafts 80 by operation of any of the tabulating keys 40, there is connected to the usual universal bar-shaft 51, which is rocked whenever a tabulating key is operated, an arm 136. Said arm 136 by means of a link 137 is connected to an arm 138, which is an extension of the arm 79 which supports the left-hand bailrod 77, shown in Figure 3. Thus, operation v of any one of the tabulating keys 40 causes the bail rod 77 to be actuated to Withdraw all the thrust-bars 73 and thereby silence the denominational selecting mechanism. It will. be understood that operation of either bailrod 77 causes the other bail-rod to be operated by means of the aforesaid U-shaped vframe 82. The varm 138 has at one end thereof a slot 140 which permits rotation of said arm 138 independently of the link 137. In a simii lar manner the arm 129 may be slotted, so that said arm 129 may of the link 128.

A feature of the invention is the provision of simplified means whereby the functions of an elimination key 141 are accomplished. Said elimination key as usual projects through a front plate 142 of the computing mechanism, and, for `the purpose of the present invention, is fastened to the end of a rod 143, the rear end of which has a bent-over tab 143a which is slotted in order to be guided by a shoulder-screw `144 fastened into the upper cover 145 of the computing mechanism.

be rotated independently I One of the functions ofthe elimination key computing machine cycle include a is to directly restore by operation of said key any index-pins which ma have been set, said restoration to be affecte independently of a computing machine cycle. A computing machine cycle is initiated by the return stroke ot' the elimination key, after the forward stroke of said key has restored the index-pins, said cycle being thus initiated in orderto restore all yparts of the computing mechanism to normal condition. The usual means for restoring said index-pins during a regular in-restoring platform 146 for each set'o rackbars 60. Said platform by the usual means shown in the aforesaid patent to Hoyt is capabley of being movediupward against the Vlower ends of the index-pins to effect restoration of said pins. The, in-restoring means also include a rotatable s aft 147 upon which is fastened, adjacent each restoring platform 146, an arm 148. gages a tab 149 projecting from the restoring platform 146. To cause said shaft 147 to be rotated b 141 and th 146, there is fastened to said shaft an arm 150. Said arm is connected by means of a link 151 to a bell-crank 152, which is pivoted upon a stud 153 fastened in the right-hand computing machine frame, not shown. A vertical arm 154 of said bell-crank is engaged by a projection 155 of the rod 143. V'Vhen the elimination key 141 is operated in a forward stroke thereof, the bell-crank 152 is rotated, and consequently the restoring platform 146 is raised to restore any index-pins that may have been set. Means whereby a computing machine cycle is initiated'by the return stroke of the elimination key will be described later on.

As already stated,.operation of any starkey also restores any index-pins that may have been set, and this is accomplished by causing the bell-crank 152 to be rotated by operation of either star-key-lever 108,

To this end, the end of each key-lever 108 is provided with a cam 108. Said cam, when a key-lever is operated, is effective torotate the corresponding interponent 107 counterclockwise. A pin 156 is driven into the end of an arm 157, and each end of said pin overlies a corresponding arm 159 of each intel'- ponent 107. The arm 157 is connected to the bell-crank 152 by a hub158. Operation of any star-key-lever 108, by means of the parts just described, causes the restoring platforms 146 to be elevated with a consequent restoration of any index-pins which may have been set. It will be noted that one of the interponents 107 is fastened to a shaft 109. The other of said interponents, of which there are two, is loosely mounted on ysaid shaft, and has a direct connection to the link 110 by means of a U-shaped extension 101. The interponent which is fastened tothe shaft 109 is connected toiits corresponding link 110 by means of an arm 1092*, which' is also fastened tothe shaft 109. The connections from each interponent to its corresponding bail 106 are shown in Figure 3.- The shaft 109 may be supported between suitable extensions 110a of the side plates 111a which frame the dial-wheels 102.

Means for driving the computing mechanism by power include an electric'motor 160 which is mounted at the rear of said computing mechanism in the substantially unoccupied space between the two sets of rackbars. Besides furnishing power to drive the computing mechanism, said motor 160 may, by means of a belt 161, be connected to drive the usual carriage-return mechanism, not shown. Said carriage-return mechanism in- The end of said arm en` operation of the elimination key ereby raise the restoring platform cludes the usual gear-reduction mechanism contained in a housing 162 fastened to the rear frame of the typewriter. yThe motor is operatedl only when` a clutch that connects said motor to the computing' mechanism is engaged. Said clutch is of the type shown in the aforesaid patent to Wood, and includesa worm 165 keyed to a shaft 166 which is flexibly coupled by the usual means (not shown) to a motor-shaft 167. The Worm 165 meshes with the usual worm-wheel 168 which is rigidly connected to a ratchet 169. Said ratchet by means of pawls 17 0 may drive a member 171upon which said pawls are mounted. The pawls 17 0 are normally held out of engagement with the ratchet i169 by pins 172 driven into ay disk 173, which is normally held in such position ast-o keep the pawls 170 dis- I from said ratchet 169. Tohold said disk 173 so that the pawls 170 are, disengaged, there is provided the usual bolt 174,

engaged and in the present invention said bolt yis formed upon an arm 175, which is fastened near one end of a shaft 176 that has its bearing in a portion of a frame 177 that includes a clutch casing 17 8. A torsion spring 179 between the arm 175 and the frame 177 is effective to urge the bolt 174 into the ath of a. projection 180 that is formed upon t e disk 173. The clutchis engagedinthe manner Aillustrated in the aforesaid patent to Wood,

when the bolt 174 is caused to be withdrawn by operation of the usual starting key.181. The means by which said starting key effects the withdrawal of the bolt 174 include the usual starting key-lever 182 connected tothe starting key-'stem 183. Said-starting keyl`ever'is effective to rotate the shaft 176 to effect withdrawal of the bolt 174 by means of an arm 184 fastenedto said shaft 17 6, the arm 184 being engagedby a stud or roll 185 .which projects from the side of the starting- .key-lcver 182. The starting key-lever 182 is pivoted in the usual manner to the right-hand computing machine frame (not shown) at 186.

Operation of the starting key 181 not only withdraws the bolt 174 to engage the clutch", but the circuit tothe motor is also closed and the motor thereby started by means which include. a contact device generally indicated as 187. Said contact device includes a pivoted lever 188 which has at its free end one of a pair of contacts 189, said contacts being normally separated, as shown in Figure 13. The

. vperspective diagram, Figure 16, shows the means whereby said contacts are `normally held separated, saidmeans, in the preferredy form of the invention, including a vertically.v Vmovable bar .190 which is notched to embrace an insulating block/191 fastened upon the lever 188. f To constrain said bar 190 to move up and downinf order to open and close the contacts 189,' saidbar is pivotally fastened at one end to'an arm 192 which is mounted upon a shaft 193. Said shaft 193 is pivotally supported between the side walls of the casin 194 of the contact device. The lower en of said bar 190 is constrained to move ina slot in the bottom wall of said casing 194. The arm 192 has at its outer end a tab 196', by miens ofwhich said arm'is uptab 196. This withdrawal of the hook-shaped member 197 from the tab 196 permits the arm towhich the bar 190 is fastened to rotate with a consequent closing of the contacts189 and starting. of-the motor, said rotation being urged by a torsion spring 202, one end of which reacts against the contact lever 188, and the other end lof which reacts against a suitably insulated portion of the casin 194. In this manner, the clutch is engage and the motor started, and, in the ensuing cycle of the computing mechanism, the general operator which includes the rack 99 moves forwardly in the direction of the arrow in Figure 16. This, as already explained, causes the lever 90 to rotate when the roll 97 .thereof is displaced from the notch 98. Rotation of the lever 90 causes rotation of a shaft 203, to

one end of which the arm 198 is fastened. To

rotate the shaft 203 by means of the lever 90, said shaft, at the other end thereof adjacent to said lever 90, has fastened to it anarm 204, at one end of which is a pin 205 that follows the roller-arm of said lever 90. rConsequently, when said lever 90 is displaced duringra computing machine cycle, the shaft 203 is free to rotatecounterclockwise of Figure 16, under Ithe influence of a, suitable sprin 203", an'd'said rotation causes the hook-shaped member 197 on the end ofthe arm 198 to move downward withtsaid end to overhaul the tab- 196 and be in position to retract the arm 192, of which saidJ tab is a part, and thereby effect separation of the contacts 189 at the end of a computing machine cycle. This separationis effected with a snap movementfat the endzcf said cycle when the-arm 91 releasesthe lever 90 at the end of a computing machine cycle in a manner' already explained.

The computing mechanism in the present form of the invention is connected to the driven clutch-member 171 by means which include a disk 206, which may be 'connected to e said driven member 171 as shown in Figure 18. Eccentricallyfastened to the outer side of the disk 206 is a roller 207. When the computing mechanism is .in its normal or` at rest position, said roller is on a line that passes through the center of said disk and coincides with the direction of movement of a member 208 which said roller as it revolves about the axis of the disk drives in a reciprocating movement that has the same direction as the reciprocating movement of the generalopei ator 95. In order that said general operator may be o erated independently of said roller, the mem er 208 isprovided with a longitudinal slot 209 that extends in the direction of said movement of the general operator. The slot 209 intersects at right angles a slot 201 by means of which 'and the roller 207 said member 208 is given its reciprocating movement.

The rearward end of the member 208, when said member is in its normal position, is supported and retained b a block 210 that is supported and retaine by a shoulder-screw 211 that is threaded into the center of the disk 206 and'rotates'vtherewith. Said block 210 fits the slot 209 of the member 208. The forward end ofthe member 208 has a longitudinal slot 212'which ts over a suitable guide 213 erected upon a cross-member 214, Figure 1, of the computing mechanism. The member 208 has formed upon its upper surface a rack 215, which meshes with a sector 216, fastened to the usual operatin shaft 120 of the computing mechanism. Said shaft has at either end the usual sector 218, which, by means of an intermediate pinion 219 meshin with each sector, drives the rack 99, which is block 210 over the roller 207. The

provided on either side of themachine, and thereby the general operator 95.

A detent is provided to locate the unit formed by the driven member 171-and the parts connected thereto in its normal or idle position vwhen the clutch is not engaged. Said detent consists of a suitably eavy spring 222, one end of which is perforated so that it may underlie the head of the shoulderscrew 211, as shown in Figure 19. The other end of the spring overlies and resses the suitably-sha ed end of a detent-pm 223 into a correspon ing recess formed in the end of a stud 224, upon which the roller 207 is pivoted. The detent-pin fits in a counterbored hole 225 that is formed in an extension of the in 223 has at its outer end a shoulder whic fits a hole in the end of the detent-spring 222. Another shoulder 226 of the detent-pin 223 fits the counter-bore of the hole 225 and prevents said pin from being thrust entirely through the block 210.

A computing machine cycle may be automatically initiated by the usual means shown in the aforesaid patent to Ku etz, said means including a lever 220 which 1s actuated by a movement of the typewriter-carriage when said carriage reaches-.the end of a computing zone. To actuatesaidl lever 220 in this manner, one of the tabplating stops 44, in the usual manner, engages the end of said lever and rocks it. By means of a link 221 said lever, when rocked, causes the usual parts shown in Figure 20V to be operated, Said parts include the vertically-movable bar 228, which, when operated by withdrawing the shaft 176. Said lever 231 is silenced by.

the operation of the non-computing lever 115,

' which, when operated, causes the usual lever 126 to thwart the operation of said lever 231. The usual attachments, some of which are not shown, on the lever 126iprovide the obstruction which opposes the operation of said lever 231. The lever 126, as already exlained, is provided with the arm 127 which orms a part of the means whereby the denominational selection of rack-bars 60 is silenced.

The means whereby the elimination key 141 in its return stroke initiates a computing machine cycle include two arms 233 and 234, said arms being spaced apart and rigidly connected by a cross-tie 235. The arms are pivoted on a post 236 erected on theupper cover 145 of the computing mechanism. A pin 237 in the end of the armA 234 connects said arm to the starting key-stem 183 in a g manner shown in the aforesaid patent to Ku etz. The end of the arm 234 is provided wit a by-pass pawl 238 which is diverted during the forward stroke of the elimination key by a pin 239 projecting from the side of the rod 143. On the return stroke of the elimination key and its rod 143, said pm 239, by means of said by-pass pawl 238, rocks the arms 233 and 234, and thereby depresses the starting keystem to initiate a computing machine cycle. A spring 240 moves the elimination key and its rod 143 in the 'return stroke. The by-pass pawl 238 is divertible by swinging about a pivot 241 and is provided with a stop-pin 242. An extended portion 243 of the by-pass pawl acts as a counterweight to hold the pawl in its normal position.

The usual subtraction-setting mechanism is of the type shown in the patent to O. Minton, No. 1,280,065, dated September 24, 1918, .and includes'a subtraction-setting key 2,44 on the end of a rod 245, which projects rearwardly, and is connected to an arm 246, as shown in Figure 20. Operation of the 4ke 244 is effective to cause rotation of a sha t 247, which has fastened to it at one end the arm 246, and midwa thereof the usual latch 248 which holdsasu traction-setting bar 249' against the tension of a spring 250. The suby.traction-Settim 'bar 249, when released by operation of t e key 244, moves rearwardly under the influence of the spring 250, and

the rearward movement is effective to set tlie f computing mechanism for subtraction by means not shown.

which an amount 1s subtractively registered, the subtraction-setting bar is retracted by the During the computing mechanism cycle in be obliterated from the rack-bars by opera- 1 tion of the elimination key. To cause the 'subtraction-setting bar 249 to beI retracted,

operation of the elimination key also automatically causes the computing mechanism to c cle in the manner and by the means alrea y described.' The wiring between thecontact-device 187 and the-motor 160 is indicated at 251, Figure 1., A plug 252 is included in said wiring, t

and the usual connection to the line may be .o made to said plug. Figure 17 shows a wiring diagram.

The Ycomputing mechanism may be manually operated by the usual handle 253, indicated by the dotted line in Figure 1. Said n handle 253 is attached in the usual manner to the operating cross-shaft 120.

AOne purpose of the pin-and-slot connection 113 and the spring 114 of the star-key mechanism is to provide a flexible conneczotion between one of the arms 112 andthe Ibail 106. This flexible connection yields as the teeth which form the detent notches 105 override the nose of a detent-lever 104, if the movement of the interponents 107 is limal ited, as shown in Figure 2, b the key-levers 108. The spring'114 also yiel'ds when operation of the key-lever 108 rotates the interponent 107 counterclockwise to restore indexpins thatmay have been set.

In order that operation of the numeralkey-levers shall not set index-pins in the rack-bars while the platen 24 is in uppercase position, there is provided means wherebythe thrust-bars 73 are caused to be shifted 5f and thereby silenced by actuation ofthe caseshift mechanism, of which only the usual case-shift frame 258 is shown.y There isprovidedaccordingly, as shown in Figure 21, a linkage 259, whereby the usual case-shift .dis-

m placement of-said case-shift frame causes av corresponding displacement of the bail-rods 77,. whicli,as already explained, causesthe thrust-bars 73 to be shifted to ineffective positions.

The usual key-locking mechanism is of the type shown in the patent to F. A; Hart, No.

1,213,100, dated January 16, 1917, and is actuated during a com uting \machine,eycle. ISaid key-locking mec anism, partly; shown fin Figure `1,'inc1udes-the link 260, whereby the displacement of the lever during a computing machine cycle causes the 'key-1 locking lever,261 to become effective to lock Y the numeral-.keys .during said cycle. Said 6I key-locking mechanism is also actuated while the typewriter-carriage is moving through a punctuation-space by means of the usual levers 262, which may be actuated by means of thrust-rods similar to the thrust-rods 65. Said levers 262 actuate the key-locking lever 261 by the usual means which include links 263.

Figure 22, shows an alternative desi of characters to be printed by what woul otherwise be the star-key-levers. This alternative design, as shown in said figure, may be numerals with a suitable border around each' printedi numeral to make it sufficiently distinctive.V

Variations may lberesorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claimz 1. In a machine having numeral-keys, a letter-feeding carriage, a plurality of spacedapart registers, asset of key-indexed means- ,for operating each register, and denomination-selecting tap ets co-operative with the s carriage, the com ination of a plurality of groups of denomination-rods, eachf group connected with a series of indexingmeans, operable seriatim by the tappets, the tappetoperated ends of all the rods grouped in a computing zone, from which zone the groups of rods diverge to the sets of register-indexing means. i

2. In a machine having numeral-keys, a letter-feeding carriage, a plurality of spacedapart registers, a set ofv key-indexed means for operating each register, and denomination-selecting tap ets ceo-'operative with the carriage., the com ination of a ,plurality of groups ofV denomination-rods, each group connected with a series of indexing means, operable seriatim by the tappets, the tappetoperated ends of the sets of rods being arranged in parallel rows, said rows extendin in the direction of travel pf the carriage, an T" 3. In a machine having numeral-keys, a

letter-feedingv carriage, a plurality of spacedi apart registers,I alset of key-indexed means` for operating veach register, and denomination-selecting tappets co-operative with the carriage, the combinationof a plurality ot groups of denomination-rods, each group connected with a series ofindexing means, operable seria-tim by the tappets, the tappet-operated ends of the sets of.- rods being arranged in parallel rows, said rows extending in the direction of travel of thefcarriage. and being grouped in a com uting zone, from which zone the groups o rods 'diverged to the sets of indexing means, and means on the tappets operable to selectively engage one row of rods` without engaging the rods of another row.,-

4.' In a machine having numeral-keys, aj

letter-feeding carriage, a plurality of spacedapart registers, a set of key-indexed means for operating each register, and denomination-selecting tappets co-operative with the carriage, the combination of a plurality of groups of denomination-rods, each group connected with a series of indexing means, operable seriatim by the tappets, the tappetoperated ends of the sets or' rods being arranged in parallel rows, said rows extending in the direction of travel of the carriage, and being grouped in a computing zone, from which `zone the groups of rods diverge to the sets of indexing-means, and means on the tappets operable to engageall the rows of rods to actuate the register-indexing means for all the registers.

5. In a machine having numeral-keys, a letter-feeding carriage, a plurality of spacedapart registers, a set of key-indexed means for operating each register` and denomination-selecting tappets co-operative with the carriage, the combination of a plurality of groups of denomination-rods, each group connected with a series of indexing means, operable seriatim by the tappets, the tappetoperated ends of each group of rods arranged in rows, and all the rows of rods positioned denominationally in one computing Zone, from which Zone the sets of rods diverge to the associated sets of register-indexing means.

6. In a machine having numeral-keys, a letter-feeding carriage, a plurality of spacedapart registers, a set of key-indexed means for operating each register, and denomination-selecting tappets co-operative with the carriage, the -combination of a plurality of groups of denomination-rods, each group connected with a series of indexing means, operable seriatim by the tappets, the tappetoperated means of each group of rods arranged in rows and'all the rows of rods positioned in denominational order in one computing Zone,`each`rod having a vertical tappet-operated section and a vertical registerindexing means-connecting section, both vertical sections joined by a diagonal section to transmit the movements of the rods to the spaced-apart register-indexing means.

7. In a machine having numeral-keys, a letter-feeding-carriage, a plurality of spacedaparttregisters, and a set of key-indexed members for operating each register, the combinationof a plurality of rows of index-member actuating rods, one row of rods connected with .each set of indexing members and each row extending in the direction -ot carriagetravel and all the rows arranged denominationally within a single computing zone adjacent the carriage-travel, and tappet-means on the carriage operable to simultaneously engage more than one row of rods, whereby rods of the same denomination in different rows are simultaneously actuated seriatim to simultaneously operate different registers, as the carriage travels through a single computing zone.

8. In a machine having numeral-keys, a letter-feeding carriage, and a plurality of spaced-apart `registers, the combination ofl -in the same zone to another register.

9. In a machine .having a letter-feeding carriage and two registers spaced apart in the direction of carriage-travel and fixed relatively to said travel, each register having a series of index members displaceable one at a time by the carriage-travel in a computing zone, the combination of two rows of memberdisplacing denomination determining rods, both rows extending in the direction oi carriage-travel and disposed one forward of the other in the one zone between the two registers, each rod of each row having a reach for connection with a corresponding index member\of the register corresponding to said row, the reaches of the two sets of rods diverging from one another and from the computing zone, and tappet-means on said carriage operable to selectively engage and actuate a certain row of said rods, as the carriage moves through the computing zone.

10. In a combined typewriting and computing machine having a plurality of registers and a letter-feeding carriage, said registers being spaced apart in the direction of carriage-travel, the combination with a plurality of sets of index members, one set for each register, said sets spaced apart like their registers. and the members of any set being actuable seriatim by the carriage'as it travels through a computing zone, of a plurality oi' sets of denomination-determining rods intermediate said carriage and the sets of index members, each set of rods being connected to corresponding spaced sets of said menibers and converging therefrom to the computing Zone, the sets of rods located in said zone being arranged in parallel rows, and means on said carriage operable to predetermine the actuation of only one row of rods by said carriage-means.

ll. In a combined typewriting and computing machine, the combination with a typewriter-carriage and a pair of spaced-apart computing registers, of sets of denominationselecting trains for said registers, said sets extending from the registers to a computing zone common to both registers, and means adjustable along the carriage for operating v one set of trains independently of the trains in the other set.

12. In a combined typewriting and computing machine, the combinationwith a typewriter-carriage and a lpair of spaced-apart computing registers, of sets of denominationselecting trains for said registers, said sets converging from the registers to a computing zone common to both registers, and tappets adjustable along the carriage, each tap- 'pet having means extending to both sets of trains for selectively operating trains in both sets simultaneously.

HENRY L. PITMAN. 

